Filtering machines for filtering sludge, sand, waste water, oil;conveyor machines in the nature of conveyors; cleaning machines for industrial and municipal waste water;separators for the separation of oil, grit and grease from waste water; screening/sifting systems comprised of bars or perforated plates to removes solids from water; screens comprising bars or perforated plates to remove solids from water; water separator machines [ ; machine parts, namely,climbing screens for separating soli...